lightnvm: remove function name in strings

For the sysfs functions, the function names are embedded into their
error strings. If the function name later changes, the string may
not be updated accordingly. Update the strings to use __func__
to avoid this.
Signed-off-by: NMatias Bjørling <mb@lightnvm.io>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

drivers/nvme/host/lightnvm.c

@@ -1028,8 +1028,8 @@ static ssize_t nvm_dev_attr_show(struct device *dev,
 	} else {
 		return scnprintf(page,
 				 PAGE_SIZE,
-				 "Unhandled attr(%s) in `nvm_dev_attr_show`\n",
-				 attr->name);
+				 "Unhandled attr(%s) in `%s`\n",
+				 attr->name, __func__);
 	}
 }
 
@@ -1103,8 +1103,8 @@ static ssize_t nvm_dev_attr_show_12(struct device *dev,
 		return scnprintf(page, PAGE_SIZE, "%u\n", NVM_MAX_VLBA);
 	} else {
 		return scnprintf(page, PAGE_SIZE,
-			"Unhandled attr(%s) in `nvm_dev_attr_show_12`\n",
-			attr->name);
+			"Unhandled attr(%s) in `%s`\n",
+			attr->name, __func__);
 	}
 }
 
@@ -1149,8 +1149,8 @@ static ssize_t nvm_dev_attr_show_20(struct device *dev,
 		return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem);
 	} else {
 		return scnprintf(page, PAGE_SIZE,
-			"Unhandled attr(%s) in `nvm_dev_attr_show_20`\n",
-			attr->name);
+			"Unhandled attr(%s) in `%s`\n",
+			attr->name, __func__);
 	}
 }